Payout device for data transmission lines and method for the production of payout device

Abstract

A storage device for data transmission lines, which serve for data transmission between a moving object and a base station, has a spool unit ( 2 ) on which a data transmission line ( 1 ) is wound in the form of a package of several layers ( 21 ) of windings. The windings in each layer are introduced at a maximum tensile stress or force, which is dependent on the modulus of elasticity of thedata transmission line ( 1 ). In this way, a creep or flow of the material of data transmission line ( 1 ), which is due to the pressure that is produced on the individual layers ( 21 ), is reduced or avoided, and a stable ordering of the windings is assured over a long period of time. The pressure of a winding on the layer ( 21 ) lying thereunder is less than 0.6 N/mm 2 , at least in the lower region of the windings. The maximum tensile stress is calculated from the diameters of data transmission line ( 1 ) and spool unit ( 2 ), the modulus of elasticity of data transmission line ( 1 ) and the total number N of layers ( 21 ) of the package.

What is claimed is:  
     
       1. A storage device for payout of a data transmission line comprising a spool and a data transmission line wound in a plurality of layers on said spool from an inner region to an outer region to form a package of said layers, said data transmission line being wound in said layers at a defined tensile stress, said defined tensile stress at which said layers are wound being less than a maximum stress F max  which is a function of the diameter of the transmission line, the diameter of said spool, the modulus of elasticity of said transmission line and the number of layers of said layers in said package in order to prevent creep between adjacent layers and provide stability of said layers, wherein each winding layer is wound at said defined tensile stress to exert a pressure on the winding layer thereunder of less than 0.6 N/mm 2  at least in the inner region of the package. 
     
     
       2. The storage device of  claim 1 , wherein the tensile stress in the winding layers increases linearly from one layer to the next outermost layer. 
     
     
       3. The storage device of  claim 1 , wherein wound layers of said line are adhered by an elastic adhesive. 
     
     
       4. The storage device of  claim 1 , wherein said spool has a surface with grooves for receiving said transmission line. 
     
     
       5. A storage device for payout of a data transmission line comprising a spool and a data transmission line wound in a plurality of layers on said spool from an inner region to an outer region to form a package of said layers, said data transmission line being wound in said layers at a defined tensile stress, said defined tensile stress at which said layers are wound being less than a maximum stress F max  which is a function of the diameter of the transmission line, the diameter of said spool, the modulus of elasticity of said transmission line and the number of layers of said layers in said package in order to prevent creep between adjacent layers and provide stability of said layers, wherein the maximum tensile stress F max  is defined by the expression          F   max     ≤           1                 Newton     N        n     +     0.3                   Newton     mm   2                           d        (       D   s     -     N   ·   d       )       N          [     1   -                n   N       ]         +       E   ·     d   E   3         3        D   s                           
       wherein n is the respective layer number, NS is the total number of layers of the package, d is the diameter of the data transmission line in mm, D S  is the diameter of the spool in mm, E is the modulus of elasticity of the data transmission line and d E  is the diameter in mm of the material of data transmission line that determines for the modulus of elasticity. 
     
     
       6. A storage device for payout of a data transmission line comprising a spool and a data transmission line wound in a plurality of layers on said spool from an inner region to an outer region to form a package of said layers, said data transmission line being wound in said layers at a defined tensile stress, said defined tensile stress at which said layers are wound being less than a maximum stress F max  which is a function of the diameter of the transmission line, the diameter of said spool, the modulus of elasticity of said transmission line and the number of layers of said layers in said package in order to prevent creep between adjacent layers and provide stability of said layers, wherein said data transmission line is a monomodal optical waveguide having one or more layers of plastic thereon, which is wound onto said spool with the defined tensile stress being less than or equal to 0.47 N. 
     
     
       7. A method for producing a storage device for a data transmission line, comprising winding a data transmission line on a spool from an inner region to an outer region in a plurality of layers to form a coil package, the line in each layer being wound with a defined tensile force said defined tensile force being less than a maximum tensile force F max  based on the diameter of the data transmission line, the diameter of the spool, the modulus of elasticity of the data transmission line and the total number of layers of the coil package to prevent creep between adjacent layers and provide stability of said layers, wherein each winding layer is wound at said defined tensile stress to exert a pressure on the winding layer thereunder of less than 0.6 N/mm 2  at least in the inner region of the package. 
     
     
       8. The method of  claim 7 , further comprising heat treating said package after completing the winding of said layers on the spool. 
     
     
       9. The method of  claim 8 , wherein said heat treatment is carried out at a temperature of more than 35° C. For at least 8 hours.